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astropy.visualization provides functionality that can be helpful when
visualizing data.
At the moment, the main functionality is image normalizing
(including both scaling and stretching).
Another feature included here is a plotting style for matplotlib.

This module includes a command-line script, fits2bitmap to convert FITS
images to bitmaps, including scaling and stretching of the image. To find out
more about the available options and how to use it, type: